The Green Hills of Tangsa

Questions:

What did Tangsa look like in the past?

What does Tangsa look like at present?

no firewood

Soil was ______ ____.carried away

no trees

In the past

At present

Trees grow _____.thickly

At present

People plant many trees __ ____ __ protect soil.

in order to

TANGSA

In the past At presentNo trees,

no firewoodTrees grow

thickly

Soil was carried away

Roots fix soil together

Trees were cut but none were planted.

A few can be cut and the rest are left to grow even taller.

Uses of trees

As a kind of fuel--firewood

Building materials

Homes(nest) of birds and wild animals

…

Give out oxygen & give foodPrevent wind from blowing hard

Make our world purer and more beautiful

Prevent flood and keep air wet

Provide a shade

storm

breeze

wind

Stop wind from blowing hard and defend sand

Carbon dioxide

CO2

H2OWater

Oxygen

O2

Cn(H2O)m

Carbon hydrate

Photosynthesis （光合作用）

Give out oxygen & supply food

water

vapor

Prevent flood Keep air wet

rain

waterwaterwaterAbsorbed by roots

Evaporated( 蒸发 ) by leaves

Burn as firewood to warm us in winter

Provide a shade

Cherry blossom

plum blossom

pinewillow

maple

Supply us beautiful environment ( 环境 )

According to the pictures below, please describe the environment around you, and point out the disasters or harm without trees!

Make full use of your imagination to put on a performanceKey: show and emphasize the importance of trees to our life.

sky …air …mountain …winter …summer …city …house …